Method for manufacturing a rear earth magnet
    2.
    发明公开
    Method for manufacturing a rear earth magnet 有权
    Herstellungsverfahren eines Seltenerd-Magnets

    公开(公告)号:EP1486989A1

    公开(公告)日:2004-12-15

    申请号:EP04022559.1

    申请日:2001-09-18

    申请人: Neomax Co., Ltd.

    IPC分类号: H01F1/057

    摘要: Rare earth alloy powder having an oxygen content of 50 to 4000 wt. ppm and a nitrogen content of 150 to 1500 wt. ppm is compacted by dry pressing to produce a compact. The compact is impregnated with an oil agent and then sintered. The sintering process includes a first step of retaining the compact at a temperature of 700°C to less than 1000°C for a period of time of 10 to 420 minutes and a second step of permitting proceeding of sintering at a temperature of 1000°C to 1200°C. The average crystal grain size of the rare earth magnet after the sintering is controlled to be 3 µ m to 9 µ m.

    摘要翻译: 氧含量为50〜4000重量%的稀土类合金粉末 ppm,氮含量为150〜1500重量%。 通过干压将ppm压实以产生紧凑。 压块用油剂浸渍,然后烧结。 该烧结工序包括在700℃〜1000℃的温度下将成形体保持10〜420分钟的第一工序,在1000℃的温度下进行烧结的第二工序 1200℃。烧结后的稀土类磁铁的平均结晶粒径控制在3μm〜9μm。